Insulated conductor of -electricity



(No Model.) 1 W. A. SHAW.

INSULATED CONDUCTOR 0P ELECTRICITY. No. 292,694. Patented Jan. 29, 1884.

UNITED STATES PATE T FFMEO WVILLIAM ANTHONY SHAW, OF PITTSBURG, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO LEBBEUS H. ROGERS, OF NEW YORK, N. Y.

INSULATED CONDUCTOR OF ELECTRICETY.

SPECIFICATION forming part of Letters Patent No. 292,694, dated January 29, 1884.

Application filed June 25,1883. (No model.)

To all whom it may concern/.-

Be it known that I, WILLIAM ANTHONY SHAW, a resident of Pittsburg, Allegheny county, Pennsylvania, (formerly of Brooklymin the 5 county of Kings and State of New York,) have invented a new and useful Improvement in Insulated Conductors of Electricity,whichin1- provement is fully set forth in the following specification.

The invention consists in providing the wire or conductor with a coating formed by precipitating alkaline silicate with chloride of calcium, the wire being first run through or coated with a solution of silicate of soda or 1 potash, and then subjected to the action of the precipitating reagent. The wire may with advantage be covered with cotton,linen,or other fiber, and then run through the solutions; but bare wire may be used.

The accompanying drawing illustrates the said mode.

A is a reel from which the cotton-covered or other wire a, covered or uncovered, passes through or underabath of soluble glass (Water- 2 5 glass or alkaline silicate) contained in a suitable vesse1,B, and thence through asolution of chloride of calcium in a vessel, 0. The wire carries with it into the calcium-chloride bath a film or coating of alkaline silicate, which is decom- 0 posed by the calcium chloride, an insoluble coating of calcium silicate being produced on the wire. The wire is allowed to dry, and may then immediately, or after an interval,be wound upon the soft-iron core of the armature of a dynamo-electric maehine,in any ordinary or suitable way of winding such armatures.

WVire protected with a flexible fireproof coating-such as above described,or of othersuit able formmay be used for winding electromagnets oftelephones or telephonic apparatus and translating devices generally, and thus the danger of fire arising from the diversion of the current from other conductors, or from lightning, or from exposure ofthe coils to excessive currents from other sources is avoided. The coated wire may also be used for other purposes. The iireproofing may be the whole or a part only of the insulating material.

I claim 9 The method of covering wire with fire-proof insulating material by coating the same with soluble glass, then subjecting it 'to the action of a decomposing agent-such as calcium chloride-so as to render the same insoluble, sub stantially as described.

In testimony whereof I havesigned this specification in the presence of two subscribing witnesses.

\VM. ANTHONY SHAW.

W'itnesses:

A. POLLOK, PHILIP MAURO. 

